What are those little doors for? Here are my personal hypotheses ...
a) coal - my parent's house has something similar, a little window through which coal used to be delivered back in the days. This seems like the most plausible explanation, except the houses seemed a little too new to have witnessed the days when coal was used for heating.
b) alternative entrance for kids - occasionaly, when my brother forgot his keys and nobody was at home, he would slide into the house through the coal window, and then hope that the cellar wasn't locked, so he could creep upstairs into the house. Of course, it was dirty and scary but kids love this sort of thing.
c) animals - I can imagine this being an urban hen house. The latest thing in eco-living: grow your own eggs.
d) little dwarf dwellings - self-explanatory. Wouldn't it be awesome? Sadly, I haven't been meeting many dwarves in London, so I think they are an extinct urban species, but maybe, just maybe they have managed to survive alongside people in this particular area.
